/*
 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 *
 */

package com.sun.security.jgss;

import javax.security.auth.Subject;
import org.ietf.jgss.GSSName;
import org.ietf.jgss.GSSCredential;

/**
 * GSS-API Utilities for using in conjunction with Sun Microsystem's
 * implementation of Java GSS-API.
 */
@jdk.Exported
public class GSSUtil {

  /**
   * Use this method to convert a GSSName and GSSCredential into a
   * Subject. Typically this would be done by a server that wants to
   * impersonate a client thread at the Java level by setting a client
   * Subject in the current access control context. If the server is merely
   * interested in using a principal based policy in its local JVM, then
   * it only needs to provide the GSSName of the client.
   *
   * The elements from the GSSName are placed in the principals set of this
   * Subject and those from the GSSCredential are placed in the private
   * credentials set of the Subject. Any Kerberos specific elements that
   * are added to the subject will be instances of the standard Kerberos
   * implementation classes defined in javax.security.auth.kerberos.
   *
   * @param principals a GSSName containing one or more mechanism specific representations of the
   * same entity. These mechanism specific representations will be populated in the returned
   * Subject's principal set.
   * @param credentials a GSSCredential containing one or more mechanism specific credentials for
   * the same entity. These mechanism specific credentials will be populated in the returned
   * Subject's private credential set. Passing in a value of null will imply that the private
   * credential set should be left empty.
   * @return a Subject with the entries that contain elements from the given GSSName and
   * GSSCredential.
   */
  public static Subject createSubject(GSSName principals,
      GSSCredential credentials) {

    return sun.security.jgss.GSSUtil.getSubject(principals,
        credentials);
  }
}
